Our home network has 3 OS X computers and 1 Windows 7 computer.
NetWorx works fine on my laptop with MacOS 10.12.6 Sierra, but my son's laptop with MacOS 10.10.4 Yosemite will not monitor the traffic on the MAC address of our router unless he selects "all networks". Selecting only the router MAC address grays out the menu bar icon. It works fine on my computer.
Is this an issue with Yosemite or a limitation of NetWorx? Ideas of work around other than selecting all networks?